Question- Treatment with the drug minocycline has been reported to cause blue-grey pigmentation of skin, sclera, fingernails, teeth, gums, and scar tissue. What is the proposed mechanism for this abnormal pigmentation?

Question- The effects of marijuana use on workplace safety are of concern. Employers and safety professionals in states where marijuana use is legal have expressed concerns about potential increases in occupational injuries, such as on-the-job motor vehicle crashes, related to employee impairment. Which occupation has the highest reported prevalence of marijuana use?

Question – Barium is a heavy metal that may be found in drinking water, vegetables, rodenticides, X-ray contrast medium, glass, and various colorants. Is there an association between maternal barium exposure and congenital heart defects in offspring?